fix: mapping of Zip and Country on RegisterAddress (closes #656) (#657)

# Description

The mapping was incorrect for these params. Leaving the invokable names
the same to avoid breaking changes, correcting the name of the param in
the request to match expectation of the API.

Closes #656 

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# Pull Request Type

Please select the option(s) that are relevant to this PR.

- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] Improvement (fixing a typo, updating readme, renaming a variable
name, etc)

Author: Justintime50

CHANGELOG.md

@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## v7.7.2 (2026-04-21)
+
+- Corrects mapping of `Zip` and `Country` params for `RegisterAddress` parameter set to `postal_code` and `country_code` on the request
+
 ## v7.7.1 (2026-04-03)
 
 - Fixes the type of the Shipment option `Machinable` from `string` to `bool` (closes #653)

EasyPost.nuspec

@@ -3,7 +3,7 @@
     <metadata>
         <id>EasyPost-Official</id>
         <title>EasyPost (Official)</title>
-        <version>7.7.1</version>
+        <version>7.7.2</version>
         <authors>EasyPost</authors>
         <owners>EasyPost</owners>
         <projectUrl>https://www.easypost.com</projectUrl>

EasyPost/Parameters/FedExRegistration/RegisterAddress.cs

@@ -52,13 +52,13 @@ public class RegisterAddress : BaseParameters<Models.API.FedExAccountValidationR
         /// <summary>
         ///     ZIP code for the FedEx registration.
         /// </summary>
-        [TopLevelRequestParameter(Necessity.Optional, "address_validation", "zip")]
+        [TopLevelRequestParameter(Necessity.Optional, "address_validation", "postal_code")]
         public string? Zip { get; set; }
 
         /// <summary>
         ///     Country code for the FedEx registration.
         /// </summary>
-        [TopLevelRequestParameter(Necessity.Optional, "address_validation", "country")]
+        [TopLevelRequestParameter(Necessity.Optional, "address_validation", "country_code")]
         public string? Country { get; set; }
 
         /// <summary>

EasyPost/Properties/VersionInfo.cs

@@ -2,6 +2,6 @@
 
 // Version information for an assembly must follow semantic versioning
 // When releasing a release candidate, append a 4th digit being the number of the release candidate
-[assembly: AssemblyVersion("7.7.1")]
-[assembly: AssemblyFileVersion("7.7.1")]
-[assembly: AssemblyInformationalVersion("7.7.1")]
+[assembly: AssemblyVersion("7.7.2")]
+[assembly: AssemblyFileVersion("7.7.2")]
+[assembly: AssemblyInformationalVersion("7.7.2")]